Merge pull request zendframework/zendframework#4336 from localheinz/h…

…otfix/use-is-int-instead-is-integer

Use is_int() instead of is_integer()

src/Adapter/DbTable/AbstractAdapter.php

@@ -149,7 +149,7 @@ public function setCredentialColumn($credentialColumn)
      */
     public function setAmbiguityIdentity($flag)
     {
-        if (is_integer($flag)) {
+        if (is_int($flag)) {
             $this->ambiguityIdentity = (1 === $flag ? true : false);
         } elseif (is_bool($flag)) {
             $this->ambiguityIdentity = $flag;